人民黄河2024，Vol.46Issue(1)：139-145,7.DOI:10.3969/j.issn.1000-1379.2024.01.024
TBM豆砾石回填灌浆层性能与密实度对支护效果的影响
Influence of Backfill Grouting Property and Compactness of TBM Pea-Gravel on Supporting Effect
摘要
Abstract
The precast lining segments,pea-gravel backfilling and grouting are adopted in the double-shield TBM(tunnel boring machine)construction,which makes the segments,backfill layer and surrounding rock form an integral supporting structure.The property and compact-ness of pea-gravel backfill grouting is an important index affecting the working performance of TBM tunnel.On the basis of a diversion tunnel constructed by the double shield TBM,the performance of pea-gravel backfill grouting in different parts was studied through laboratory tests.The effects of the performance and compactness of backfilled pea-gravel on the support effect were analyzed by means of numerical simulation.The results show that there are great differences in the elastic modulus and uniaxial compressive strength of pea gravel due to the uneven den-sity of grouting.When there is no void between the lining and the pea-gravel,the different parameters of the pea-gravel have little effect on the stress distribution of segments,but the stress in various parts of the lining varies.The stress state of the hollow part of the lining and pea-gravel is different from that with no void.There is a relatively obvious stress condition in the hollow part of the segment,and the stress value exceeds the design value of concrete tensile strength.In tunnel construction,we should pay attention to whether the lining is closely combined with the pea-gravel and strengthen the quality supervision of pea-gravel backfilling and grouting.关键词
双护盾TBM/隧洞施工/豆砾石回填灌浆/管片衬砌/灌浆层密实度/支护效果Key words
double-shield TBM/tunnel construction/pea-gravel backfill grouting/segment lining/property and compactness/support effect分类
建筑与水利引用本文复制引用
杨风威,金俊超,杨凡杰..TBM豆砾石回填灌浆层性能与密实度对支护效果的影响[J].人民黄河,2024,46(1):139-145,7.基金项目
国家自然科学基金资助项目(52179113) （52179113）
水利部重大科技项目(SKR-2022029) （SKR-2022029）
中国博士后科学基金资助项目(2022M721299) （2022M721299）
河南省重点研发与推广专项(232102320339) （232102320339）
